Problem: You are given three numbers. Is there a way to replace variables A, B and C with these numbers so the equality A + B = C is correct?

Input:

There are three numbers X1, X2 and X3 (1 ≤ Xi ≤ 10^100), each on a separate line of input.

Output:

Output either "YES", if there is a way to substitute variables A, B and C with given numbers so the equality is correct, or "NO" otherwise.

Sample Input:

1

2

3

Output:

YES

Sample Input:

1

2

4

Output

YES

Sample Input:

1

3

5

Output

NO

SAMPLE INPUT
1
2
3

SAMPLE OUTPUT
YES

Solution (in PYTHON):

Solution:
a=int(raw_input())
b=int(raw_input())
c=int(raw_input())
l=[a,b,c]
def ckh(x,y,z):
	flag=0
	if((x+y)==z):
		flag=1
	return(flag)
p=1
while(p):
	if(l[0]==2*l[2] or l[0]==2*l[1] or l[2]==2*l[1] or l[2]==2*l[0] or l[1]==2*l[2] or l[1]==2*l[0] ):
		print('YES')
		p=0
	else:
		if(ckh(l[0],l[1],l[2])):
			print('YES')
			p=0
		elif(ckh(l[1],l[2],l[0])):
			print('YES')
			p=0	
		elif(ckh(l[2],l[0],l[1])):
			print('YES')
			p=0
		else:
			print("NO")
			p=0